[PATCH] selftests/mm: Replace obsolete memalign() with posix_memalign()

[Deming Wang]

memalign() is obsolete according to its manpage.

Replace memalign() with posix_memalign() and remove malloc.h include
that was there for memalign().

As a pointer is passed into posix_memalign(), initialize *p to NULL
to silence a warning about the function's return value being used as
uninitialized (which is not valid anyway because the error is properly
checked before p is returned).

Signed-off-by: Deming Wang <wangdeming@xxxxxxxxxx>
---
 tools/testing/selftests/mm/soft-dirty.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/mm/soft-dirty.c b/tools/testing/selftests/mm/soft-dirty.c
index 21d8830c5f24..4bb7421141a2 100644
--- a/tools/testing/selftests/mm/soft-dirty.c
+++ b/tools/testing/selftests/mm/soft-dirty.c
@@ -80,8 +80,8 @@ static void test_hugepage(int pagemap_fd, int pagesize)
 	int i, ret;
 	size_t hpage_len = read_pmd_pagesize();
 
-	map = memalign(hpage_len, hpage_len);
-	if (!map)
+	ret = posix_memalign((void *)(&map), hpage_len, hpage_len);
+	if (ret < 0)
 		ksft_exit_fail_msg("memalign failed\n");
 
 	ret = madvise(map, hpage_len, MADV_HUGEPAGE);
-- 
2.27.0